feat(striker-ui-api): add initial traverse function

striker-ui-api/src/lib/traverse.ts

@@ -0,0 +1,28 @@
+type NestedObject<T> = {
+  [key: number | string]: NestedObject<T> | T;
+};
+
+export const traverse = <T, O extends NestedObject<V>, V = unknown>(
+  obj: O,
+  init: T,
+  onKey: (previous: T, obj: O, key: string) => { is: boolean; next: O },
+  {
+    onEnd,
+    previous = init,
+  }: {
+    onEnd?: (previous: T, obj: O, key: string) => void;
+    previous?: T;
+  } = {},
+) => {
+  Object.keys(obj).forEach((key: string) => {
+    const { is: proceed, next } = onKey(previous, obj, key);
+
+    if (proceed) {
+      traverse(next, init, onKey, { previous });
+    } else {
+      onEnd?.call(null, previous, obj, key);
+    }
+  });
+
+  return previous;
+};